Magnetic and electrode properties, structure and phase relations of the layered triangular-lattice tellurate Li4NiTeO6статья
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Дата последнего поиска статьи во внешних источниках: 9 июня 2015 г.
Аннотация:We examined the magnetic properties of layered oxide Li4NiTeO6 by magnetic susceptibility,
magnetization and ESR measurements and density functional calculations, and characterized phase
relations, crystal structure and electrochemical properties of Li4NiTeO6. The magnetization and ESR
data indicate the absence of a long-range magnetic order down to 1.8 K, and the magnetic susceptibility
data the presence of dominant antiferromagnetic interactions. These observations are well accounted
for by density functional calculations, which show that the spin exchanges of the LiNiTeO6 layers in
Li4NiTeO6 are strongly spin frustrated. The electrochemical charging of Li4NiTeO6 takes place at
constant potential of ca. 4.2 V vs. Li/Li+ indicating two-phase process as confirmed by X-rays. The
starting phase is only partially recovered on discharge due to side reactions.